add mkostemp, mkstemps, and mkostemps functions and reorganize temp internals

[musl] / src / temp / mkostemps.c

diff --git a/src/temp/mkostemps.c b/src/temp/mkostemps.c
new file mode 100644 (file)
index 0000000..804a547
--- /dev/null
+++ b/src/temp/mkostemps.c
@@ -0,0 +1,32 @@
+#define _BSD_SOURCE
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include "libc.h"
+
+char *__randname(char *);
+
+int __mkostemps(char *template, int len, int flags)
+{
+       if (len < 0) return EINVAL;
+
+       size_t l = strlen(template)-len;
+       if (l < 6 || strncmp(template+l-6, "XXXXXX", 6)) {
+               errno = EINVAL;
+               *template = 0;
+               return -1;
+       }
+
+       int fd, retries = 100;
+       while (retries--) {
+               __randname(template+l-6);
+               if ((fd = open(template, flags | O_RDWR | O_CREAT | O_EXCL, 0600))>=0)
+                       return fd;
+               if (errno != EEXIST) return -1;
+       }
+       return -1;
+}
+
+weak_alias(__mkostemps, mkostemps);
+weak_alias(__mkostemps, mkostemps64);